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🛡️ Travel smart, fit more, protect best — the last car seat you'll ever need!
The Diono Radian 3R is a premium all-in-one convertible car seat designed for 10 years of use, from birth to booster (5-120 lbs). Its slim-fit design allows three seats to fit across most vehicles without compromising safety or comfort. Engineered with a reinforced automotive-grade steel frame, it offers extended rear-facing protection up to 50 lbs and is FAA approved for air travel. With easy installation features and machine washable covers, it’s the ultimate blend of safety, convenience, and style for modern families on the go.






























| ASIN | B083F5P7VP |
| Age Range Description | Newborn |
| Best Sellers Rank | #1,388 in Baby ( See Top 100 in Baby ) #8 in Convertible Child Safety Car Seats |
| Brand | Diono |
| Color | Black Jet |
| Customer Reviews | 4.7 out of 5 stars 8,229 Reviews |
| Forward Facing Car Seat Minimum Height | 29.9 Inches |
| Forward Facing Maximum Weight | 120 Pounds |
| Forward Facing Minimum Weight | 26.5 Pounds |
| Global Trade Identification Number | 00677726506200 |
| Harness Type | 5-Point |
| Included Components | radian® 3R car seat, detachable rear-facing base, foam harness pads, lap belt cushion, Safe Stop®energy absorbing harness, rear-facing top tether, Instruction manual |
| Infant Toddler Car Seat Type | Convertible Car Seat |
| Installation Type | Latch |
| Item Dimensions D x W x H | 16.1"D x 16.9"W x 28.4"H |
| Item Type Name | All-in-One |
| Item Weight | 23.02 Pounds |
| Manufacturer | Diono |
| Manufacturer Warranty Description | 12 months |
| Material | Alloy Steel, Plastic, Polypropylene, Polystyrene |
| Material Type | Alloy Steel, Plastic, Polypropylene, Polystyrene |
| Maximum Height Recommended | 57 Inches |
| Maximum Weight Recommendation | 120 Pounds |
| Minimum Height Recommendation | 18.1 Inches |
| Minimum Weight Recommendation | 5 Pounds |
| Model Number | 50620 |
| Number of Height Positions | 1 |
| Orientation | Convertible Seat |
| Part Number | 50620 |
| Product Dimensions | 16.1"D x 16.9"W x 28.4"H |
| Rear Facing Car Seat Maximum Height | 44.1 Inches |
| Rear Facing Maximum Weight | 50 Pounds |
| Rear Facing Minimum Weight | 5 Pounds |
| UPC | 677726506200 |
| Unit Count | 1.0 Count |
J**S
I like it but it's heavy and tricky to install
I got this for my youngest who sits in the middle with booster seats on each side for her brothers. It is narrower than the one it replaces and I really like the red color and design. It looks like a high quality car seat and feels premium. It looks great and fits great in my Range Rover Velar. Overall, I like it but there are a few things to consider: PROS 1. Great looking design 2. Premium feel 3. Easy for my 4-year-old daughter to buckler herself 4. Narrow 5. Comfortable for my daughter CONS 1. It's VERY heavy. If you have to take this seat out from time to time, that might be a concern. This is for my car but my wife would never go for a seat this heavy. It seems like it weighs twice as much as the older Maxi Cosi seat it replaces. If the weight of the seat is a concern, avoid this one. 2. There is nothing intuitive about installing this thing. I had to watch a YouTube video just to find the installation instructions. I'm not kidding - they are hidden in the back fabric and housing. Once you have the instructions, they are not much help. This illustrations are professionally drawn but hard to understand. Even getting the various straps out of the back plastic housings is tricky.
A**N
Easy to Install and Uninstall
They truly do fit 3 across, even in my compact SUV. The quality is nice and easy to assemble and clean! One of the easiest car seats to install and uninstall in a car. Personal I would not recommend for Forward facing though, even though they say they can, it does not seem secure enough for me!
A**R
As shown. Very sturdy.
I am very happy with this car seat. I had trouble with cupholders but made it work. Everything else is great. Safe and sturdy.
R**G
Best car seat out there!
Our favorite car seat / booster or all time! Worth the price!! Fits 3 across, easy for toddler to buckle themselves and goes in the third row of the car! Also it’s good for 10 years which is much longer than most car seats!
P**S
Great for Tight Spaces and Growing Kids
This is an excellent car seat for a growing toddler or child. We loved it so much that we purchased one for every car, including the grandparents’. My son had difficulty getting in and out of his previous car seat and struggled with buckling, but he has completely mastered it with this one. He feels more independent and proud that he can get in and out on his own. Another big plus is how space-conscious this seat is. We can comfortably fit two car seats and a third person in the middle seat of our SUV, which is perfect when traveling with extra passengers. Installation is easy, making it simple to move between different vehicles if needed.
A**R
Sleek, but Tricky Installation
The setup took forever and the channels seem designed for tiny hands. If your hands are average or larger, you will not have fun reaching inside the belt paths. Plus, it felt nearly impossible to tighten the anchor strap for that installation method. May be easier to just use the seat belt method. Very sleek look when installed, great for complementing the interior of your sports/luxury vehicle while hauling kids about. Rear-facing installation eliminates all legroom for the poor soul sitting in front, so beware. Angle adjustment with a separate foam pad (not available on Amazon) may fix this, but I haven’t tried it. Really wish it came with a lower anchor strap for rear-facing installation like other Swedish style seats. Others say the car seat is heavy and bulky, but I didn’t notice anything. Seems like an average weight for a car seat.
S**F
Magenta is beautiful, kids love these car seats
Had it for about 2 months. This radiant pink is beautiful! My toddler loves it too. It was more difficult to install it rear facing so ended up setting it up forward facing. Instructions aren’t super easy to follow, nor the installation process. Lucky for me husband got it figured out. Removability: Haven’t removed it yet since the day it was installed so can’t speak to that. It fits great and gives plenty of space for children to move around when not buckled in. Based on my children’s unspoken review (I can tell they love sitting in it and enjoy being able to see through the window), I would definitely recommend other parents to get it. There isn’t much side padding like impact safety that other car seats have but it doesn’t bother me since it’s certified for safety. My 3 year old can unbuckle the top part himself. The buckle design is durable and yet comfortable. Haven’t seen any marks on the neck from the harness rubbing against their body. I think it’s great! I hope it will last for a long time as advertised.
D**E
Safe, affordable, & comfort all in one!!!
Great car seat! It’s sturdy & very sheik I love the easy cleaning fabric it has, it is very heavy which makes me feel like my baby is safe in it! It’s got adjustable shoulder straps & head rest adjustments as well so it can grow with your baby. The seat part also has side adjustments so it can be narrow or wider which is a neat feature! I won’t be using it for travel but it folds up and could be easy to transport if you can carry the heavy weight of it. For the price of this car seat it was a steal!!! We spent double on a Gracie brand before and i feel this car seat is much safer, it’s also roll over tested which is great because not many car seats have that. I will say the cup holders are terrible they fall out very easily but I rather my kid be safe than have a cup holder!!! I was able to fit 2 of these car seats in with a Doona in my Ford Escape 2018 which was suppose to be impossible but the fact of how compact it is made it possible, my boys also say it’s very comfortable which is a huge bonus! Definitely a must buy car seat!!!
E**I
Excelente tamaño y seguridad
La mejor silla si tienes una familia de 3 niños caben perfectamente 3 sillas en la parte trasera del coche
L**T
Buen asiento
Ocupas ser un Ingeniero Aeronautico o automotriz para Instalarlo. Es demasiado Dificil su instalación. Pero brinda buena protección al BB
L**A
5 point harness for older children
Great chair struggled to get a chair with a 5 point harness for my 5year old who can't use a normal seatbelt.
J**E
Our favourite car seat
We love this chair; and have had a variety of other brand car seats over the years. 1) it's more narrow and streamlined than anything else we've used - which is why we bought it (3 kids in a 5 year window and a 3 across car seat configuration). 2) The straps adjust easily; tighten and loosen smoothly! (other seats we've used feel like you're constantly tugging and readjusting and just fighting with the straps. I've never fought with these). 3) maintenance is simple, cover goes on and off easily and you can throw it in the wash. It has other cool features we haven't used much, but I like that it can basically fold up if you ever travel with it. "Cons". a) The seat is heavy, so if you're moving it from one car to another often that would be a pain. Personally I like how solid it feels, and we don't move it much so it's not an issue. b) we put a small rip in the cover fabric the month we got it, but were able to sow it back up and no issues since (one of the kids climbed over the back of the seat and their shoe somehow snagged the cover). c) REAR FACING the seat leans back really far (further than any other seat we've used) - you have to move the front seat ahead of it quite a ways up for it to fit properly. They do sell an angle adjuster that can go under the seat to help mitigate this, but I haven't purchased one. Either way, we love it and maybe should've picked a more gender neutral colour. I wish we had started with this car seat from the beginning with our first kid.
L**I
Great Car Seat – We Bought Two
This was our first car seat purchase of this brand, and we’re so happy with it! Our child loves it even on long drives. It was super easy to install, and we felt confident choosing it after reading the strong safety ratings. It’s also easy to clean the cover comes off easily and can be tossed in the wash, then air-dried. It’s narrow enough to fit multiple seats across and works great rear-facing in smaller vehicles as well. We liked it so much, we bought a second one for our other vehicle. Great quality at a reasonable price highly recommend!
Trustpilot
3 weeks ago
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